Brake mechanism for anchor shuttle-box motions for looms



2 Sheets-Sheet 1.

(No ModeL) O P. LEOLERE. BRAKE MECHANISM FOR ANOHOR SHUTTLE BOX MOTIONS FOR LlOOMs. NO. 274.127.

PatentedMar. 20,1883.

N. PETERS. Hmo-Lhhomphr. Wm D. C.

(No Model.) 2 Sheets-Sheet 2.

r F. LEOLERE.

BRAKE MECHANISM FOR. ANGHOR SHUTTLE'BOX MOTIONS FOR Looms. 110,274,127. Patented Mar-.20,1883.-

Wilma-mes: 152%72209.

N. PETERS MW Wllhinflm D. C.

UNITED STATES PATENT OFFICE.

FRANCIS LEGLERE, OF PHILADELPHIA, PENNSYLVANIA.

BRAKE MECHANISM FOR ANCHOR SHUTTLE-BOX MOTIONS FOR LOO MS.

SPECIFICATION forming part of Letters Patent No. 274,127, dated March 20, 1883. v

Application filed August 19, 1882. (No model.) 1

of which the-following is a specification.

My invention consists of an improved brake mechanism for anchor shuttle-box motions for looms, wherein the leverage of the brake-lever is kept always the same, and the brake-shoe is allowed to adjust itself to the segment of the box-lever. Thus the same amount of frictionupon the segment is always produced by the brake, Whether the box-lever is in a position to be moved from the lowest or highest locking-notch or from an intermediate to a higher or lower notch, and the action of the brake is thereby made full,-certain, and uniform, its shoe bearing upon the outer surface of the segment of the box-lever with full and certain efl'ect, holding the latter from undue movement during the time the toe of the locking-lever is withdrawn from any locking-notch of the box-lever segment. This withdrawal of the toe of the locking-lever takes place just in time to allow the box-lever to be moved by the flukes of the anchor in one direction or the other, accordingly as the boxes have to be raised or lowered to bring a shuttle carrying a proper color of thread on a line with the race of the lathe or surface upon which the shuttle slides through the shed.

Anchor'shuttle-box motions, as well as other similar box motions, require to have the acquired momentum of the box-lever and all moving parts connected with it arrested after eachchange in the shuttle-boxes has been effected. A friction-brake acting upon the Seg mentally-formed end of the box-lever has been employed for the purpose, and this brake, as heretofore constructed, bears upon the flange or segment secured to the box-lever by means of a friction-bearing shoe or surface, which is rigidly connected with the brake-lever, and

moves with it on a. common fulcrum. With this brake difficulty has been experienced from the change which takes place in the relation of the frictional surface or segment of the boxlever with respect to theaxis or fulcrum of the brake-lever, which change is due to the following cause: When the friction' surface or,

as these movements of the box-lever take place,

and hence the control of the brake over the movement of the-parts will be uncertain and irregular. I attain a uniform action of the brake by jointing the brake-shoe to the brakelever. thereby leaving the shoefree to keep to or follow the segmental friction-surface of the box-lever, and causing the force exerted upon the brake-lever to be always centered and applied to the friction-surface through the point where the shoe is pivoted to the lever. The leverage of the brake therefore remains always the same, whatever may be the elevation of the box-lever segment.

The anchor box motion to which I have shown my invention applied is or may be similar to that shown in Letters Patent Nos.

193,783 or 194,771, to which reference may be? had. The flukes of the horizontally-vibrating anchor which I have shown alternately take hold of stepped blocks on opposite sides of the fulcrum of the box-lever for the purpose of raisin g or lowering the shuttle-boxes, said anchor, with other connected parts, being controlled by a suitable pattern mechanism adapted to .the requirements of the case, and as these parts are or may be the same as those shown and described in the patents above noted they form. no part of my claim, and need not be further described herein.

In the accompanying drawings, Figure l is a side elevation of a portion of an anchor shuttle-box motion with my invention. applied thereto. Fig. 2 is a horizontal section of Fig. l on a plane below the roller of the slide and above the cams and levers. Fig. 3 isa vertical transverse sectional view of parts of the mechanism shown in Fig.1. Fig. 418 a detail sectional view of the mechanism shown in Fig. 1, and Fig. is a detail sectional view in the line 00 a; of Fig. 1.

'A in the views represents a portion of a loom-frame; B,the shuttle-box-lifting rod; 0, the horizontally-vibrating and vertically-sliding anchor; D, the shuttle-box lever, pivoted at t to the frame A; E, the slotted slide-bar carrying the anchor O; F, the cam-shaft carrying two cams, G G'-one for lifting the slidebar and anchor and the other for operating the locking-lever I. H is the roller carried by the slide-bar E, upon which the cam G acts to lift the anchor, for the purpose of operating the shuttle-box lever in the usual way. H H are stepped blocks applied on the box-leverone to the right and the other the left of its fulcrum t. as indicated in the drawings. By means of these blocks the flakes of the anchor take hold of the box-lever and operate it. The anchor, by a horizontal vibratory movement imparted to it by the pattern mechanism, as usuahhas one or theother ofits fiukes brought to a lifting position with respect to one or the other of the blocks, and its other fluke moved outof its former lifting position by means and in a manner well understood.

The box-lever D has a segmental laterallyextended portion or end, d, in which any desired number of locking-notches d are formed, said notches being cut in the inner surface of the segment. A space or groove, d is formed between one side of the body of the lever and the notched portion of its segment. The outer periphery of the segmental part of the shuttle-box lever, as well as the inner surface, should be concentric with the fulcrum pin t' of the box-lever. Above the notched surface of end (1 an angular or elbow-locking lever, I, is hung upon a horizontal ,pin or pivot, b, of the frame A. One end of this lever extends down into the groove (1 and is provided with a lateral ot the box-lever, so as to drop into either of the notches when necessary. The other end of this lever extends forward and inward on an oblique line, as shown in Fig. 2, so as to have its terminus, which is slightly bent downward or formed with a rounded projection, rest upon the unlocking-cam G on shaft F, which, as before stated, carries the anchor shuttle-box motion-lifting cam G. This end of the lever I is kept in a locking position by an adjustable spring, 0, until the cam G overcomes the power of this spring.

Behind the segmental surface of the shuttle-box lever D a curved brake-lever, J, is applied, said lever having as its pin or pivot the same pin, 1 as the lever I. In the front side of this lever, near the middle of its length, a semicircular groove or oblong socket, f, is formed, and laterally extending from the front of this socket are semi-cylindrical notches f, which are out into the front of this lever, there being one notch on each side of the groove orsockeet. To this grooved or socketed and notched portion of the lever J a segmental brake-shoe, K, is fitted loosely by means of a half-ball projection, 9, and two semi-cylindrical lateral projections. g.a projection being on each side of the half -ba ll projection 9. By this means the brake-shoe K is held to the lever, and while in action it cannot separate by either a downward or sidewise movement, although it is allowed freedom to roll on its ball and. turn on its cylindrical projections, and thus have its segmental surface always follow and keep closely in contact with every part of the segmental surface of the shuttle-box lever, as illustrated in the drawings, while the force exerted upon the brake-lever will always be centered and applied to the friction-surfacethrough the point where the shoe is pivoted to the lever. The leverage of the brake therefore remains always the same, whatever may be the elevation of the box-lever seginentthat is, whether it be in the position shown in Fig. 1 or in that shown in Fig. 4, or in an intermediate position relatively to those shown in Figs. 1 and 4. The brake-shoe lever is held in action by an adjustable spring, h, attached by one of its ends to the lower end of said lever, and by its other end to the frame of the loom.

The segmental surface of the brake-shoe of my device can be made to perfectly fit the segmental surface of the shuttle-box lever by grinding off the surfaces truly; or, if desired, a fine leather or other facing of concentric form may be applied to one or the other of the segmental surfaces.

My invention insures to the weaver employing looms provided with the anchor-box mo-' tion that he may depend upon the restraining action of the brake upon the box-lever, the brake being no longer ununiform or insufficient, but uniform and effective for the purposes set fOIlh.

In operation the cam G lifts the elbow-lever I, and thereby moves the tooth or toe c outof a notch of the segment end d of box-lever D, and places the box-lever wholly under the friction-a1 control of the brake-lever, and as said box-lever is moved by the anchors to its proper position the-brake-shoe maintains its concentricbearing-contaet upon the segmental surface or end d, and at all times acts uniformly, its force being regulated through the spring h, which acts upon the lever J.

What I claim as my invention, and desire to secure by Letters Patent, is v 1. The combination, with the box-lever, of a friction-brake the bearing-shoe of which is constructed separately from the brake-lever, and is loosely connect-ed to said lever, whereby said shoe is caused to adjust itself, as occasion requires, to the segment end of the box-lever, and the leverage of the brake-lever is always the same, substantiallya-sand for the purpose described.

2. The brake-lever provided with an oblong socketorgroovmf, andsemi-cylindricalnotches let'er I, springs e and h, slide 1' and cams G f f, in combination'with the brake-shoe K, provided with a half-ball projection and semicylindrical project-ions g g, and the box-lever 5 D, having the segment end and the spring h,

substantially as and for the purpose described. 3. The combination of the shoe K with the brake-lever J, box-lever D, anchor G, lockingand G, substantial! described.

Witnesses:

y as and for the purpose :0

FRANCIS LEoLERE.

R. M. HARTLEY, J. U. POWELL. 

